QR Code, a type of bar code that consists of a printed square pattern of small black and white squares that encode data which can be scanned into a computer system. The black and white squares can represent numbers from 0 to 9, letters from A to Z, or characters in non-Latin scripts such as
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Data Matrix - Wikipedia
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What's The Difference Between A Data Matrix And A QR Code?
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Types of the two-dimensional matrix barcodes
